Who wouldn’t want a sixty-round magazine for their trusty AR, one which fits in roughly the same space as a standard thirty-round mag?

Nobody I know.

Problem is, such a magazine doesn’t exist. But there is a way to link two thirty-round mags so that the switch from the thirtieth to the thirty-first cartridge is extremely fast. Much faster than any switch to a second magazine kept in a pouch on your body.

Twice as fast.

We were doing this in the SEAL Teams decades ago. Today companies make magazine duplexing gadgets that you can buy, but don’t bother with them. The old way is better, because the bottom of the home-made double mag…